FULLY INTEGRATED AUDIOPROCESSOR
5 STEREO + 1 MONO INPUTS
FOUR INDEPENDENT SPEAKER OUTPUTS
DYNAMIC COMPRESSION STAGE FOR CD
SUBWOOFER OUTPUT
SOFTSTEP FEATURE FOR VOLUME
VOICE-BAND FILTER
DIRECT MUTE AND SOFTMUTE
PAUSE DETECTOR
FULLY PROGRAMMABLE BY I

C BUS IN-

TERFACE

DESCRIPTION
The TDA7462 is a high performance audioproc-
essor with fully integrated audio filters. The digi-
tal control allows the programming of all filter
characteristics in a wide range without the need
of external components. New innovative features
are included , a dynamic compression stage to

optimize audio response of CD sources an addi-
tional output channel for subwoofer and a sepa-
rate source selector for rear channel. The use of
a dedicated BICMOS process makes signal proc-
essing very linear thus achieving low distortion
and low noise figures.

November 2001

SUPPLY

VOLUME

CREF

OUT LF

D96AU864

C BUS

BEEP

PDL

INPUT

MULTIPLEXER

+ MIXING-STAGE

PAUSE

LOUDNESS

SOFT

MUTE

BASS

TREBLE

VOICE-BANDPASS

OUT RF

OUT RR

OUT RL

SDA

SCL

MONO

FADER

DIGITAL CONTROL

CD R+

PDR

PDGND

SE1L

GND

MUTE

CD L+

SUBWOOFER

OUT

FRONT

SELECTOR

REAR

SELECTOR

CD L-

CD R-

SE1R

SE2R

SE2L

MD+

MD-

SEM/SE3L

SE3R

FRONT
FADER

REAR

FADER

REAR

FADER

IN-GAIN +

AUTO ZERO

COMPANDER

LOUDNESS

IN-GAIN

SUBWOOFER

PAUSE

DETECT.

SUBOUT+

SUBOUT-

BLOCK DIAGRAM

SO28

ORDERING NUMBER: TDA7462D

TDA7462

DUAL AUDIOPROCESSOR WITH COMPANDER

AND SUBWOOFER OUTPUT

1/25

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

Operating Supply Voltage

10.5

amb

Operating Ambient Temperature Range

-40 to 85

°C

stg

Operating Storage Temperature Range

-55 to 150

°C

SUPPLY

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Voltage

7.5

10.2

Supply Current

= 9V

SVRR

Ripple Rejection @ 1KHz

Audioprocessor (all filters flat)

ESD
All pins are protected against ESD according to the MIL883 standard.

THERMAL DATA

Symbol

Parameter

Value

Unit

th-j pins

Thermal Resistance Junction-pins Max

°C/W

SE1L

SE1R

MD+

MD-

CDL+

CDR-

CDL-

CDR+

PDR

OUTLR

OUTRF

OUTLF

SCL

PAUSE

SDA

MUTE

SE3R

SE3L

PDGND

OUTRR

D98AU865

PDL

SE2L

SE2R

SUBOUT-

SUBOUT+

CREF

GND

PIN CONNECTION

TDA7462

2/25

PIN DESCRIPTION

Name

Function

Type

SE1L

Single Ended Input 1 Left Channel

SE1R

Single Ended Input 1 Right Channel

MD+

Mono Differenzial Input +

MD-

Mono Differenzial Input -

CDL+

CD Input Left Channel +

CDL-

CD Input Left Channel -

CDR-

CD Input Right Channel -

CDR+

CD Input Right Channel +

PDR

Pseudo Differential Input Left

PDGND

Pseudo Differential Common Ground

PDL

Pseudo Differential Input Right

SE2L

Single Ended Input 2 Left Channel

SE2R

Single Ended Input 2 Right Channel

CREF

Stabilizer Capacitor Pin

GND

Supply Ground

Supply Voltage

SUBOUT-

Subwoofer Output -

SUBOUT+

Subwoofer Output +

OUTRR

Speaker Output Right Rear

OUTLR

Speaker Output Left Rear

OUTRF

Speaker Output Right Front

OUTLF

Speaker Output Left Front

PAUSE

Pause Detector Output

SCL

C bus clock

SDA

C bus data

I/O

MUTE

Softmute drive

SE3R

Single Ended Input 3 Right Channel

SE3L

Single Ended Input 3 Left Channel

Pin type legenda:

I = Input

O = Output

I/O = Input/Output

S = Supply

TDA7462

3/25

ELECTRICAL CHARACTERISTICS (V

= 9V; T

amb

= 25°C; R

= 10K

; all gains = 0dB; f = 1KHz;

unless otherwise specified).

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

INPUT SELECTOR

Input Resistance

all inputs except Phone

100

130

Clipping Level

2.2

2.6

RMS

Input Separation

100

IN MIN

Min. Input Gain

-1

IN MAX

Max. Input Gain

STEP

Step Resolution

0.5

1.5

DC Steps

Adjacent Gain Step

-5

MIN

to G

MAX

-10

offset

Remaining offset with AutoZero

0.5

DIFFERENTIAL CD STEREO INPUT

Input Resistance

Differential

100

130

Gain

only at true differential input

-1
-5

-11

-6

-12

-7

-13

dB
dB
dB

CMRR

Common Mode Rejection Ratio

= 1V

RMS

@ 1KHz

= 1V

RMS

@ 10KHz

Output Noise @ Speaker Output

20Hz to 20KHz flat; all stages 0dB

DIFFERENTIAL MD INPUT

Input Resistance

Differential

CMRR

Common Mode Rejection Ratio

= 1V

RMS

@ 1KHz

= 1V

RMS

@ 10KHz

Output Noise @ Speaker Output

20Hz to 20KHz flat; all stages 0dB

DIFFERENTIAL PHONE INPUT

Input Resistance

Differential

100

130

CMRR

Common Mode Rejection Ratio

= 1

VRMS

@ 1KHz

= 1

VRMS

@ 10KHz

BEEP CONTROL

RMS

Beep Level

250

350

500

BMIN

Lower Beep Frequency

740

780

820

BMAX

Higher Beep Frequency

1.48

1.56

1.64

KHz

MIXING CONTROL

LEVEL

Mixing Level

Main/Mix-Source

-3.5/-9.6

-6/-6

-12/-2.5

VOLUME CONTROL

MAX

Max Gain

MAX

Max Attenuation

-83

-79.5

-75

STEP

Step Resolution

0.5

Attenuation Set Error

G = -20 to 20dB

-0.75

0.75

G = -80 to -20dB

-4

Tracking Error

DC Steps

Adjacent Attenuation Steps

0.1

From 0dB to G

MIN

0.5

LOUDNESS CONTROL

STEP

Step Resolution

0.5

1.5

MAX

Max. Attenuation

CMIN

Lower Center Frequency

360

400

440

CMAX

Higher Center Frequency

720

800

880

TDA7462

4/25

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SOFT MUTE

MUTE

Mute Attenuation

100

Delay Time

0.48

0.96

30.7

123

170

THlow

Low Threshold for SM Pin

THhigh

High Threshold for SM Pin

2.5

Internal Pull-up Resistor

100

130

SOFT STEP

Switch Time

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

0.16
0.32
0.64
1.28
2.56
5.12
10.2
20.4

ms
ms
ms
ms
ms
ms
ms
ms

BASS CONTROL

RANGE

Control Range

STEP

Step Resolution

0.5

1.5

Center Frequency

100

110

BASS

Quality Factor

0.9

1.1

1.25

1.4

1.3

1.5

1.7

1.8

2.2

GAIN

Bass-Dc-Gain

DC = off

-1

DC = on

4.4

TREBLE CONTROL

RANGE

Control Range

STEP

Step Resolution

Center Frequency

KHz

12.5

KHz

17.5

KHz

SPEAKER ATTENUATORS

RANGE

Control Range

-53

-47

STEP

Step Resolution

0.5

MUTE

Output Mute Attenuation

Attenuation Set Error

-2

DC Steps

Adjacent Attenuation Steps

0.1

1) The SM pin is active low (Mute = 0)

TDA7462

5/25

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

FADER OUTPUTS

CLIP

Clipping Level

d = 0.3%

2.2

2.6

RMS

Output Load Resistance

Output Load Capacitance

OUT

Output Impedance

100

DC Voltage Level

4.3

4.5

4.7

PAUSE DETECTOR

Zero Crossing Threshold

Window 1

Window 2

Window 3

Window 4

160

DELAY

Pull-Up Current

THP

Pause Threshold

3.0

VOICE BANDPASS

Highpass corner frequency

HP1

HP2

162

180

198

HP3

117

130

143

HP4

234

260

286

Lowpass corner frequency

fLP1

2.7

3.3

kHz

LP2

5.4

6.6

kHz

SUBWOOFER ATTENUATORS

RANGE

Control Range

-53

-50

-47

STEP

Step Resolution

0.5

1.5

MUTE

Output Mute Attenuation

Attenuation Set Error

DC Steps

Adjacent Attenuation Steps

DIFFERENTIAL OUTPUTS

Load resistance at each output

RMS

; AC coupled; THD = 1%

RMS

; AC coupled; THD = 1%

Load resistance differential

1VRMS; AC coupled; THD = 1%

RMS

; AC coupled; THD = 1%

Capacitive load at each output

CLMIN at each Output to
Ground

470

LMAX

Capacitive load at each output

LMAX

at each Output to Ground

DLMAX

Capacitive load differential

CLMAX between Output
terminals

Offset

DC Offset at pins

Output muted

-10

OUT

Output Impedance

100

DC Voltage Level

4.3

4.5

4.7

Output Noise

Output muted

COMPANDER

MAX

Max. Compander Gain

< -40dB

ATT

Attack time

Att1

Att2

Att3

Att4

Rel

Release time

Rel1

195

Rel2

390

Rel3

780

Rel4

1.56

REF

Compander Reference Input-
Level (equals 0dB)

1kHz sine-wave

0.5

RMS

Compression Factor

Output Signal/Input Signal

0.5

2) Steps are increasing if the attenuation is higher than 24dB.

TDA7462

6/25

ELECTRICAL CHARACTERISTICS (continued)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

GENERAL

Output Noise

BW = 20 Hz to 20 KHz
output muted

BW = 20 Hz to 20 KHz
all gain = 0dB single ended
inputs

S/N

Signal to Noise Ratio

all gains = 0dB flat; V

= 2V

RMS

106

bass treble at 12dB;
a-weighted; V

= 2.6V

RMS

100

Distortion

= 1V

RMS

; all stages 0dB

0.005

0.1

= 1V

RMS

; Bass & Treble = 12dB

0.05

0.1

Channel separation Left/Right

100

Total Tracking Error

= 0 to -20dB

-1

= -20 to -60dB

-2

MAIN FEATURES SUMMARY
Input Multiplexer

One fully differential CD stereo input with
switchable attenuation
One quasi-differential stereo input
Three single-ended stereo inputs
One1 differential mono input
In-Gain 0..15dB, 1dB step
Internal Offsetcancellation (AutoZero)
Separate source selector for rear channel

Beep

Internal beep with 2 frequencies

Mixing stage

4 step-mixing stage with phone or rear-selector
as mix-signals

Loudness

Second order frequency response
Programmable center frequency and quality
factor
15 x 1dB attenuation steps
Selectable flat-mode (constant attenuation)

Volume

0.5dB attenuion step
80dB control range
Soft-step control with programmable times

Compander

Dynamic range compression for use with CD
source

2:1 compression rate
Max. gain 15dB

Bass

2nd order frequency response
Center frequency programmable in 4 steps
DC gain programmable
15 x 1dB steps

Treble

2nd order frequency response
Center frequency programmable in 4 steps
7 x 2dB steps

Voice Bandpass

2nd order Butterworth highpass filter with pro-
grammable cut-off frequency
2nd order butterworth lowpass filter with pro-
grammable cut-off frequency

Speaker

Four independent speaker controls in 1dB
steps
Control range 50dB
Separate Mute drive

Subwoofer

Differential mono output
Control range 50dB
2nd order lowpass filter

Mute Functions
Direct mute

TDA7462

7/25

Mute Functions

Direct mute
Digitally controlled softmute with 4 program-
mable mute times

Pause Detector

Programmable threshold
Delay time defined by external capacitor

FUNCTIONAL DESCRIPTION
Input Stages
Most of the input stages are similar to the others
ST audioprocessors with exception of the CD in-
puts (see Figure 1). In fact there are some CD
players in the market having a significant high
source impedance which affects strongly on the
common-mode rejection (CHRR) of the normal
differential input stage. The additional buffer of
the TDA7462 CD input avoids this drawback and

15K

100K

CD+

CD-

15K

PD+

PDGND

15K

D98AU866

100K

IN GAIN

SE1

SE2

SE3

15K

100K

28K

MDGND

MD+

28K

Figure 1. Input Stage

TDA7462

8/25

offers the full common-mode rejection even with
those CD players.

AutoZero Stage
In order to reduce the number of pins there is no
AC coupling between the In-Gain and the follow-
ing stage, so that any offset generated by or be-
fore the stage would be transferred or even am-
plified to the output. To avoid that effect, a special
offset cancellation stage called AutoZero is imple-
mented. This stage is located before the mixing
block to eliminate all offsets generated by the in-
put and the In-Gain (notice that externally gener-
ated offsets, e.g. generated through the leakage
current of the coupling capacitors, are not can-
celled).
The auto-zeroing is started every time the data-
byte 0 is selected and takes a time of max.
0.3ms. To avoid audible clicking the audioproces-
sor is muted before the loudness stage during
this time.

AutoZero Remain
In some cases, for example if the

P is executing

a refresh cycle of the I

C bus programming, it is

not useful to start a new AutoZero action because
no new source is selected and an undesired mute
would appear at the outputs. For such applica-
tions the TDA7462 could be switched in the
AutoZeroRemain mode. If this bit is set to high,
the databyte 0 could be loaded without invoking
the AutoZero and the old adjustment value re-
mains.

Full Mixing Stage
The four-level mixing stage offers the possibility
to mix the rear selector signal or the phone signal
to any other source. Due to the fact that the mix-
ing stage is located after the In-Gain stage fine
adjustments of the main source level could be
done in this way.

Figure 2. Signal Flow of Mixing Stage.

TDA7462

9/25

SoftMute
The digitally controlled SoftMute stage allows
muting/de-muting the signal with a I

C bus pro-

grammable slope. The mute process can either
be activated by the SoftMute pin(SM) or by the
I

C bus. This slope is realized in a special S-

shaped curve to mute slow in the critical regions
(see Figure 6).
For timing purposes the Bit 3 of the I

C bus out-

put register is set to 1 from the start of muting un-
til the end of de-muting.

SoftStep Volume
When the volume level is changed audible clicks
could appear at the output. The root cause of
those clicks could either be a DC offset before
the volume stage or the sudden change of the
envelope of the audio signal. With the SoftStep
feature both kinds of clicks could be reduced to a
minimum and are no more audible. The blend
time from one step to the next is programmable in
four steps.

-20.0

-15.0

-10.0

-5.0

0.0

10.0

100.0

1.0K

10.0K

Figure 3. Loudness Attenuation @ fc = 400Hz

(second order)

-20.0

-15.0

-10.0

-5.0

0.0

10.0

100.0

1.0K

10.0K

Figure 4. Loudness Center frequency @ Attn.

= 15dB (second order)

100

1,000

-20

-15

-10

-5

(dB)

D98AU844

Figure 5. Loudness @ Attn. = 15dB, fc = 400Hz

EXT.

MUTE

+SIGNAL

REF

-SIGNAL

C BUS

OUT

Time

D97AU634

Figure 6. Softmute Timing

2dB

1dB

-1dB

-2dB

Time

D97AU635

VOUT

10ms

Figure 7. Soft Step Timing

Note: Please notice that a started Mute action is always terminated
and could not be interrupted by a change of the mute signal.

Note: For steps more than 1dB the softstep mode should be
deactivated because it could generate a 1dB error during the
blend-time

TDA7462

10/25

0.0

2.5

5.0

7.5

10.0

12.5

15.0

10.0

100.0

1.0K

10.0K

Figure 11. Bass normal and DC Mode @ Gain

= 14dB, fc = 80Hz

0.0

2.5

5.0

7.5

10.0

12.5

15.0

10.0

100.0

1.0K

10.0K

Figure 10. Bass Quality factors @ Gain =

14dB, fc = 80Hz

0.0

2.5

5.0

7.5

10.0

12.5

15.0

10.0

100.0

1.0K

10.0K

Figure 9. Bass Center @ Gain = 14dB, Q = 1

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

10.0

100.0

1.0K

10.0K

Figure 8. Bass Control @ fc = 80Hz, Q = 1

0.0

2.5

5.0

7.5

10.0

12.5

15.0

10.0

100.0

1.0K

10.0K

Figure 13. Treble Center Frequencies

@ Gain = 14dB

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

10.0

100.0

1.0K

10.0K

Figure 12. Treble Control @ fc = 17.5KHz

FILTER CHARACTERISTICS (BASS, TREBLE, VOICE-BAND)

Note: The center frequency, Q and DC-mode can be set
independently.

TDA7462

11/25

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

100.0

1.0K

10.0K

Subwoofer Application
Figure 14. Subwoofer Application with LPF

80/115Hz and HPF 90/130Hz

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

100.0

1.0K

10.0K

VoiceBand Application
Figure 15. VoiceBand Application with HPF

180/260Hz and LPF 3k/6kHz

80Hz/115Hz

Figure 16. Switchable configuration for Front/Rear processing

Speaker Attenuator
Due to practical aspects the steps in the speak-
erattenuators are not linear over the full range. At
attenuations more than 24dB the steps increase
from 1.5dB to 10dB (see data byte specification).

Subwoofer
The Subwoofer output is a differential mono out-
put with 6dB gain. The outgoing signal generated

by adding the left and the right channel. The at-
tenuator is exactely the same like the other
speakers.
In some applications it could be helpful to change
the phase of this output by software. For this pur-
pose a bit is available in the subwoofer byte to
change the phase from 0° to 180°.

TDA7462

12/25

Compander Stage
To achieve the desired compression charac-
teristic like shown below the volume has to be
decreased by 4dB.

When the compander is working a volume word
coming from this stage is added to the I

C bus

volume word and the volume is changed with a

soft slope between adjacent steps. As mentioned
in the description of this stage it is not recom-
mended to change the volume during this slope.
The compander-hold bit (Bit 7 in the subaddress-
byte) is present to implement the volume change
more easily. The recommended sequence for
changing the volume level when compander fea-
ture is on is the following:

1. Set the compander-hold bit
2. Wait the actual SoftStep time
3. Change the volume
4. Reset the compander-hold bit

The SoftStep times are (in compander ON condi-
tion) automatically adapted to the attach time of
the Compander. In the following table the related
SoftStep times are shown:

Attack-Time

SoftStep Time

6ms 0.16ms

12ms 0.32ms

24ms

0.64ms

48ms

1.28ms

-60

-50

-40

-30

-20

-10

-20

-30

-40

-50

-60

Input Level

Outp

t
L

-8dB

15dB

-38dB

2:1

Figure 17. Compander Characteristics

TDA7462

13/25

S = Start
R/W = "0" -> Receive Mode (Chip could be
programmed by

"1" -> Transmission Mode (Data could be
received by

ACK = Acknowledge
P = Stop

TRANSMITTED DATA (send mode)

MSB

LSB

SM = Soft mute activated
ST = Stereo
X = Not Used

The transmitted data is automatic updated after
each ACK. Transmission can be repeated without
new chipaddress.

Reset Condition
A Power On reset (POR) is invoked if the supply
voltage is below than 3.5V. After that the follow-
ing data is written automatically into the registers
of all subaddresses:

MSB

LSB

The programming after POR is marked bold-face
/ underlined in the programming tables.
With this programming all the outputs are muted
to V

REF

OUT

= V

/2).

CHIP ADDRESS SUBADDRESS DATA 1 ... DATA n

8 Bit

MSB

LSB

MSB

LSB

MSB

LSB

S 1 0 0 0 1 0 0 R/W ACK I

ACK

DATA

ACK P

C BUS INTERFACE DESCRIPTION

Interface Protocol
The interface protocol comprises:
- a start condition (S)
- a chip address byte (the LSB bit determines

read / write transmission)
- a subaddress byte
- a sequence of data (N-bytes + acknowledge)
- a stop condition (P)
- the max. Clock Speed is 500kbits/s

TDA7462

14/25

SUBADDRESS (receive mode)

MSB

LSB

FUNCTION

0
1

Compander Hold

off
on

0
1

AutoZero Remain

off
on

0
1

Testmode

off
on

0
1

Auto-Increment Mode

off
on

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1

0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1

Main Selector
Main Loudness
Volume
Bass-Config./Treble
Bass
Speaker attenuator LF
Speaker attenuator RF
Rear Selector
Rear Loudness
Speaker attenuator LR
Speaker attenuator RR
Subwoofer
SoftMute/Mixing
Compander
Configuration
Testing

For more information see Compander section

For more information see AutoZero section

For more information see Test Programming block

If this bit is set to "1", the subaddress is automatically incremented after the transmission of a data-byte.

Therefore a transmission of more than one byte without sending the new subaddress is possible.

TDA7462

15/25

DATA BYTE SPECIFICATION
Main Selector

MSB

LSB

FUNCTION

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

Source Selector
Mono Differential
Single Ended 1
Full Differential
Single Ended 2
Pseudo Differential
Single Ended 3
Mute
beep

1
1

0
0

1
1

0
0

1
1

0
0

1
0

Input Gain
15dB
14dB
:
1dB
0dB

0
1

Pause Source Selector
Single Ended 3
Pseudo Differential

Main Loudness

MSB

LSB

LOUDNESS

0
0

1
1

0
0

1
1

0
0

1
1

0
1

Attenuation
0dB
-1dB
:
-14dB
-15dB

0
1

Filter
on
off (flat)

0
1

Center Frequency
400Hz
800Hz

0
1

Loudness Q
First order
Second order

0
1

SoftStep Volume
off
on

Note: The attenuation is specified at high frequencies. Around the center frequency the value is different depending on the
programmed attenuation (see Loudness frequency response).

TDA7462

16/25

Volume

MSB

LSB

ATTENUATION

0
0

0
0
0

1
1

0
0

0
0
0

0
1
1

1
1

0
0

0
0
0

1
0
0

0
0

1
1
1

1
0
0

1
1

0
0

1
1
1

1
0
0

1
1

0
0

0
0
0

1
0
0

1
1

0
0

0
0
1

1
0
0

1
1

0
1

0
1
0

1
0
1

0
1

Gain/Attenuation
+32.0dB (Note)
+31.5dB
:
+20.0dB
+19.5dB
+19.0dB
:
+0.5dB
0.0dB
- 0.5dB
:
-79.0dB
-79.5dB

Note: It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by
software to the maximum value, which is needed for the system.

Bass Configuration. & Treble Programming

MSB

LSB

BASS & TREBLE ATTENUATION

0
0

0
0
1
1

1
1

0
0

1
1
1
1

0
0

1
1
1
1

0
0

0
1

0
1
1
0

1
0

Treble Steps
-14dB
-12dB
:
-2dB
0dB
0dB
+2dB
:
+12dB
+14dB

0
0
1
1

0
1
0
1

Treble Center Frequency
10.kHz
12.5kHz
15.0kHz
17.5kHz

0
0
1
1

0
1
0
1

Bass Center Frequency
60Hz
70Hz
80Hz
100Hz

TDA7462

17/25

Bass Programming

MSB

LSB

BASS ATTENUATION

0
0

0
0
1
1

1
1

0
0

1
1
1
1

0
0

1
1
1
1

0
0

1
1
1
1

0
0

0
1
1
0

1
0

Bass Steps
-15dB
-14dB
:
-1 dB
0 dB
0 dB
+1 dB
:
+14dB
+15dB

0
0
1
1

0
1
0
1

Bass Q Factor
1
1.25
1.5
2

0
1

Bass DC-Mode
off
on

Note: For more information please refer to section Bass description

Speaker Attenuation Front (left & right channel)

MSB

LSB

ATTENUATION/BASS CF

0
0

0
0
0
0
0
0
0
0
0
1

0
0

1
1
1
1
1
1
1
1
1

0
0

0
1
1
1
1
1
1
1
1

0
0

1
0
0
0
0
1
1
1
1

0
0

1
0
0
1
1
0
0
1
1

0
1

1
0
1
0
1
0
1
0
1

Attenuation
0dB
-1dB
:
-23dB
-24.5dB
-26dB
-28dB
-30dB
-32dB
-35dB
-40dB
-50dB
Speaker Mute

0
1

Bass Center-Frequency (only Speaker LF)

Bass 150Hz
Bass 100Hz

For this Bass Center-Frequency must be programmed to 100Hz

TDA7462

18/25

Rear Selector

MSB

LSB

FUNCTION

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

Source Selector
Mono Differential
Single Ended 1
Full Differential
Single Ended 2
Pseudo Differential
Single Ended 3
Mute
Beep

1
1

0
0

1
1

0
0

1
1

0
0

1
0

Input Gain
15dB
14dB
:
1dB
0dB

must be "1"

Rear Loudness

MSB

LSB

FUNCTION

0
0

1
1

0
0

1
1

0
0

1
1

0
0

1
1

Attenuation
0dB
-1dB
:
-14dB
-15dB

0
1

Filter
on
off

0
1

Center Frequency
400Hz
800Hz

0
1

Loudness Order
First Order
Second Order

0
1

Beep Frequency
781Hz
1.56kHz

Note: The programming of the Main- and Rear-Selector as well as the Main- and Rear-Loudness is exactly the same, except the MSB's.

TDA7462

19/25

Speaker Attenuation Rear (left & right channel)

MSB

LSB

FUNCTION

0
0

0
0
0
0
0
0
0
0
0
1

0
0

1
1
1
1
1
1
1
1
1

0
0

0
1
1
1
1
1
1
1
1

0
0

1
0
0
0
0
1
1
1
1

0
0

1
0
0
1
1
0
0
1
1

0
1

1
0
1
0
1
0
1
0
1

Atenuation
0dB
-1dB
:
-23dB
-24.5dB
-26dB
-28dB
-30dB
-32dB
-35dB
-40dB
-50dB
Speaker Mute

0
1

Input Signal for Rear Speaker (only Spkr LR)

Rear Channel
Main Channel

0
1

Subw. Low-Pass Frequency (only Spkr RR)
80Hz
115Hz

0
1

Input Signal for Subwoofer (only Spkr RR)

Rear Channel
Main Channel

see Figure 16 Switch RearSel

see Figure 16 Switch SubwSel

TDA7462

20/25

SoftMute and Mixing

MSB

LSB

FUNCTION

0
1

Mute
enable SoftMute
disable SoftMute

0
0
1
1

0
1
0
1

Mute Times
0.48ms
0.96ms
30.7ms
122.8ms

0
1

Mixing Source
Rear-Selector
Phone

0
0
1
1

0
1
0
1

Mixing Level (Main/Mix-Source)
-12/-2.5dB
-6/-6dB
-3.5/-9.6dB
0/

0
0
1
1

0
1
0
1

CD Full-Differential Gain
-12dB
-6dB
-6dB
0dB

Subwoofer

MSB

LSB

FUNCTION

0
0

0
0
0
0
0
0
0
0
0
1

0
0

1
1
1
1
1
1
1
1
1

0
0

0
1
1
1
1
1
1
1
1

0
0

1
0
0
0
0
1
1
1
1

0
0

1
0
0
1
1
0
0
1
1

0
1

1
0
1
0
1
0
1
0
1

Attenuation
0dB
-1dB
:
-23dB
-24.5dB
-26dB
-28dB
-30dB
-32dB
-35dB
-40dB
-50dB
Speaker Mute

0
1

Subwoofer Phase
180°
0°

0
1

Subwoofer Low-Pass Filter
off
on

TDA7462

21/25

Compander

MSB

LSB

FUNCTION

0
1

Activity
off
on

0
0
1
1

0
1
0
1

Attack Times
6ms
12ms
24ms
49ms

0
0
1
1

0
1
0
1

Release Times
195ms
390ms
780ms
1.56s

0
0
0
0
1
1
1
1

0
0
1
1

0
1
0
1

0
0
1
1

0
1
0
1

SoftStep Time

160

320

640

1.28ms
2.56ms
5.12ms
10.2ms
20.4ms

0
1

Max. Compander Gain
23dB
19dB

0
1

Compander Input
Rear Selector (after Rear InGain)
Front Selector (after Front InGain)

1) Only possible if the Compander is off (Bit D0 set to 0)

Configuration

MSB

LSB

FUNCTION

0
1

Pause Detector
off
on

0
0
1
1

0
1
0
1

Pause ZC Window
160mV
80mV
40mV
20mV

0
1

Voice-Band Low-Pass Enable
Filter off
Filter on

0
1

Voice-Band Low-Pass Frequency
3kHz
6kHz

0
1

Voice-Band High-Pass Enable
Filter off
Filter on

0
0
1
1

0
1
0
1

High-Pass Cut-Off-Frequency
90Hz
180Hz
130Hz
260Hz

TDA7462

22/25

Testing

MSB

LSB

FUNCTION

0
1

Main Testmode Switch

off
on

0
0
0
0
1
1
1
1

0
0
1
1
0
0
1
1

0
1
0
1
0
1
0
1

Test Multiplexer
Compander Log-Amp. Output
Compander Low-Pass Output
Compander DAC Output
internal 200kHz Clock
not allowed
not allowed
internal Bandgap Voltage
not allowed

0
1

Compander Testmode
off
on

0
1

Clock
external
internal

must be "1"

1) To avoid inadvertently programming of the Main-Testmode as well the Compander testmode it is mandatory to set the Bit 5 in the
subaddress-byte to high at the same time.

SE1L

SE1R

100nF

MD+

MD-

100nF

CDL+

100nF

CDL-

100nF

TAPEL

TAPER

PHONE+

PHONE-

CDL+

CDL-

CDR-

100nF

CDR-

SUBOUT+

100nF

SUBOUT+

SUBOUT-

100nF

SUBOUT-

OUTRR

OUTLR

OUTRF

OUTLF

D98AU867

MUTE

SCL

SDA

SCL

SDA

100nF

PDR

PAUSE

SE3L

SE3R

100nF

GND

OUTRR

CDR+

100nF

CDR+

47nF

CREF

AMMONO

PAUSE

PDGND

100nF

PDL

100nF

SE2R

SE2L

STDL

STDR

EXTR

EXTGND

EXTL

Figure 18. Application Circuit.

TDA7462

23/25

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

STMicroelectronics GROUP OF COMPANIES

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Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.

http://www.st.com

TDA7462

25/25

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TDA7462D

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: TDA7462D